Google I/O 2009 – Pixel Perfect Code: How to Marry Interaction and Visual Design the Android Way Chris Nesladek A great user experience incorporates three pillars: structure, behavior, and expression. This talk will explore the wide variety of interaction design patterns we have built into the Android system framework to help educate you on the best way to use these pattern-based behaviors for an optimized user experience. For presentation slides and all I/O sessions, please go to: code.google.com/events/io/sessions.html